Why processing matters: The truth about Bentonite Clay and heavy metal binding.
Highly processed bentonite clay can lose its ability to bind to heavy metals.
Not all bentonite clay is created equal. Learn how processing impacts its ability to bind heavy metals—and why the unprocessed calcium montmorillonite bentonite clay in our Mineral Toothpowder is a safer, smarter choice.
Here’s why, in clear and simple terms:
1. Bentonite’s detox power comes from its natural structure.
Bentonite clay— especially calcium montmorillonite bentonite clay — is prized for its:
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High surface area
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Negative ionic charge
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Layered structure (called “smectite”), which allows it to adsorb toxins by trapping them between the layers
These properties enable it to adsorb (not absorb) positively charged toxins and heavy metals—essentially grabbing and holding onto them so they can’t be absorbed into the body.
2. Excessive processing can damage this structure.
Here’s how:
Thermal treatment
Some industrial processes use high heat (e.g., for sterilization or drying), which can alter the clay’s crystal structure, reducing its surface area and weakening the electrical charge. This reduces or destroys its adsorptive capacity.
Studies confirm that thermal degradation leads to reduced cation exchange capacity (CEC) — a key measure of the clay’s ability to bind metals.
Chemical treatments
To “purify” or “bleach” clay, manufacturers sometimes use acids or other chemicals. These treatments can:
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Strip the clay of natural minerals that contribute to its negative charge
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Reduce layer spacing, impairing the ability to trap toxins
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Create an inert or weakened material with minimal binding power
Particle over-refinement
Clay that’s been ground too fine or stripped of its colloidal properties may lose the hydration and swelling characteristics that aid adsorption.
3. Unprocessed = Functionally Active
In contrast, unprocessed, food-grade calcium montmorillonite bentonite clay retains:
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Its natural mineral profile
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Its electrical charge
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It's layered, swelling structure
This is why it’s still actively used in detox protocols, and why processing matters.
In short:
Calcium Bentonite clay works because of its structure and charge. If you destroy the structure or neutralize the charge through harsh processing, it stops working the way nature intended.
